In the Android emulator, I tap on an item on my tabbar - I see it lights up... but then nothing. When I tap anywhere else on the screen, the handler fires and the label dims again.

This behaviour doesn't happen on the actual device I'm testing with (but does happen on some other devices). It also doesn't happen in Chrome -- in both of these cases, a single tap is enough to fire the handler. The code in question looks like this: